<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <script src="./js/index.js"></script>
    <style>
        .menu{
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
    </style>
  </head>
  <body>
    <div class="menu ">
      <div class="rotate">
        <button>向右旋转90</button>
        <button>向左旋转90</button>
      </div>
      <div class="roll">
        <button>水平翻转</button>
        <button>垂直翻转</button>
      </div>

    </div>
    <canvas id="canvas"></canvas>
  </body>
</html>
